Question: How was the population of the Los Rios Region determined to be 380131?
Paraphrase: What information was used to determine a population of 380131 in the Los Rios Region?
SPARQL (Wikidata): SELECT ?value WHERE { wd:Q2177 p:P1082 ?s . ?s ps:P1082 ?x filter(contains(?x , '380131')) . ?s pq:P459 ?value}